Oxford Steam Plough Co
of Cowley, Oxford.
Made a steam plough
1913-1917 For a list of the models and prices of Steam Motor Wagons, Tractors and Ploughs etc. see the 1917 Red Book
1919 Introduced the Allen road scarifier, which took advantage of the weight of the road roller for re-surfacing roads.
Presumably later became John Allen and Sons (Oxford) Ltd.